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High-dose vitamin D: No help for bone health

from MedPage Today

Vitamin D might not be much help for strengthening bones among healthy adults without osteoporosis, Canadian researchers reported, even at doses far higher than recommended daily allowances. In a clinical trial assessing three levels of daily vitamin D supplementation -- 400 IU, 4,000 IU, and 10,000 IU -- radial volumetric bone mineral density (BMD) was significantly lower among those (ages 55-70) taking higher doses for three years, according to Steven Boyd, Ph.D., of the University of Calgary in Canada, and colleagues. more


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